2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
30 #include <drm/drm_atomic.h>
31 #include <drm/drm_plane_helper.h>
34 * drm_atomic_state_default_release -
35 * release memory initialized by drm_atomic_state_init
36 * @state: atomic state
38 * Free all the memory allocated by drm_atomic_state_init.
39 * This is useful for drivers that subclass the atomic state.
41 void drm_atomic_state_default_release(struct drm_atomic_state
*state
)
43 kfree(state
->connectors
);
44 kfree(state
->connector_states
);
46 kfree(state
->crtc_states
);
48 kfree(state
->plane_states
);
50 EXPORT_SYMBOL(drm_atomic_state_default_release
);
53 * drm_atomic_state_init - init new atomic state
55 * @state: atomic state
57 * Default implementation for filling in a new atomic state.
58 * This is useful for drivers that subclass the atomic state.
61 drm_atomic_state_init(struct drm_device
*dev
, struct drm_atomic_state
*state
)
63 /* TODO legacy paths should maybe do a better job about
64 * setting this appropriately?
66 state
->allow_modeset
= true;
68 state
->num_connector
= ACCESS_ONCE(dev
->mode_config
.num_connector
);
70 state
->crtcs
= kcalloc(dev
->mode_config
.num_crtc
,
71 sizeof(*state
->crtcs
), GFP_KERNEL
);
74 state
->crtc_states
= kcalloc(dev
->mode_config
.num_crtc
,
75 sizeof(*state
->crtc_states
), GFP_KERNEL
);
76 if (!state
->crtc_states
)
78 state
->planes
= kcalloc(dev
->mode_config
.num_total_plane
,
79 sizeof(*state
->planes
), GFP_KERNEL
);
82 state
->plane_states
= kcalloc(dev
->mode_config
.num_total_plane
,
83 sizeof(*state
->plane_states
), GFP_KERNEL
);
84 if (!state
->plane_states
)
86 state
->connectors
= kcalloc(state
->num_connector
,
87 sizeof(*state
->connectors
),
89 if (!state
->connectors
)
91 state
->connector_states
= kcalloc(state
->num_connector
,
92 sizeof(*state
->connector_states
),
94 if (!state
->connector_states
)
99 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state
);
103 drm_atomic_state_default_release(state
);
106 EXPORT_SYMBOL(drm_atomic_state_init
);
109 * drm_atomic_state_alloc - allocate atomic state
112 * This allocates an empty atomic state to track updates.
114 struct drm_atomic_state
*
115 drm_atomic_state_alloc(struct drm_device
*dev
)
117 struct drm_mode_config
*config
= &dev
->mode_config
;
118 struct drm_atomic_state
*state
;
120 if (!config
->funcs
->atomic_state_alloc
) {
121 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
124 if (drm_atomic_state_init(dev
, state
) < 0) {
131 return config
->funcs
->atomic_state_alloc(dev
);
133 EXPORT_SYMBOL(drm_atomic_state_alloc
);
136 * drm_atomic_state_default_clear - clear base atomic state
137 * @state: atomic state
139 * Default implementation for clearing atomic state.
140 * This is useful for drivers that subclass the atomic state.
142 void drm_atomic_state_default_clear(struct drm_atomic_state
*state
)
144 struct drm_device
*dev
= state
->dev
;
145 struct drm_mode_config
*config
= &dev
->mode_config
;
148 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state
);
150 for (i
= 0; i
< state
->num_connector
; i
++) {
151 struct drm_connector
*connector
= state
->connectors
[i
];
157 * FIXME: Async commits can race with connector unplugging and
158 * there's currently nothing that prevents cleanup up state for
159 * deleted connectors. As long as the callback doesn't look at
160 * the connector we'll be fine though, so make sure that's the
161 * case by setting all connector pointers to NULL.
163 state
->connector_states
[i
]->connector
= NULL
;
164 connector
->funcs
->atomic_destroy_state(NULL
,
165 state
->connector_states
[i
]);
166 state
->connectors
[i
] = NULL
;
167 state
->connector_states
[i
] = NULL
;
170 for (i
= 0; i
< config
->num_crtc
; i
++) {
171 struct drm_crtc
*crtc
= state
->crtcs
[i
];
176 crtc
->funcs
->atomic_destroy_state(crtc
,
177 state
->crtc_states
[i
]);
178 state
->crtcs
[i
] = NULL
;
179 state
->crtc_states
[i
] = NULL
;
182 for (i
= 0; i
< config
->num_total_plane
; i
++) {
183 struct drm_plane
*plane
= state
->planes
[i
];
188 plane
->funcs
->atomic_destroy_state(plane
,
189 state
->plane_states
[i
]);
190 state
->planes
[i
] = NULL
;
191 state
->plane_states
[i
] = NULL
;
194 EXPORT_SYMBOL(drm_atomic_state_default_clear
);
197 * drm_atomic_state_clear - clear state object
198 * @state: atomic state
200 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
201 * all locks. So someone else could sneak in and change the current modeset
202 * configuration. Which means that all the state assembled in @state is no
203 * longer an atomic update to the current state, but to some arbitrary earlier
204 * state. Which could break assumptions the driver's ->atomic_check likely
207 * Hence we must clear all cached state and completely start over, using this
210 void drm_atomic_state_clear(struct drm_atomic_state
*state
)
212 struct drm_device
*dev
= state
->dev
;
213 struct drm_mode_config
*config
= &dev
->mode_config
;
215 if (config
->funcs
->atomic_state_clear
)
216 config
->funcs
->atomic_state_clear(state
);
218 drm_atomic_state_default_clear(state
);
220 EXPORT_SYMBOL(drm_atomic_state_clear
);
223 * drm_atomic_state_free - free all memory for an atomic state
224 * @state: atomic state to deallocate
226 * This frees all memory associated with an atomic state, including all the
227 * per-object state for planes, crtcs and connectors.
229 void drm_atomic_state_free(struct drm_atomic_state
*state
)
231 struct drm_device
*dev
;
232 struct drm_mode_config
*config
;
238 config
= &dev
->mode_config
;
240 drm_atomic_state_clear(state
);
242 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state
);
244 if (config
->funcs
->atomic_state_free
) {
245 config
->funcs
->atomic_state_free(state
);
247 drm_atomic_state_default_release(state
);
251 EXPORT_SYMBOL(drm_atomic_state_free
);
254 * drm_atomic_get_crtc_state - get crtc state
255 * @state: global atomic state object
256 * @crtc: crtc to get state object for
258 * This function returns the crtc state for the given crtc, allocating it if
259 * needed. It will also grab the relevant crtc lock to make sure that the state
264 * Either the allocated state or the error code encoded into the pointer. When
265 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
266 * entire atomic sequence must be restarted. All other errors are fatal.
268 struct drm_crtc_state
*
269 drm_atomic_get_crtc_state(struct drm_atomic_state
*state
,
270 struct drm_crtc
*crtc
)
272 int ret
, index
= drm_crtc_index(crtc
);
273 struct drm_crtc_state
*crtc_state
;
275 crtc_state
= drm_atomic_get_existing_crtc_state(state
, crtc
);
279 ret
= drm_modeset_lock(&crtc
->mutex
, state
->acquire_ctx
);
283 crtc_state
= crtc
->funcs
->atomic_duplicate_state(crtc
);
285 return ERR_PTR(-ENOMEM
);
287 state
->crtc_states
[index
] = crtc_state
;
288 state
->crtcs
[index
] = crtc
;
289 crtc_state
->state
= state
;
291 DRM_DEBUG_ATOMIC("Added [CRTC:%d] %p state to %p\n",
292 crtc
->base
.id
, crtc_state
, state
);
296 EXPORT_SYMBOL(drm_atomic_get_crtc_state
);
299 * drm_atomic_set_mode_for_crtc - set mode for CRTC
300 * @state: the CRTC whose incoming state to update
301 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
303 * Set a mode (originating from the kernel) on the desired CRTC state. Does
304 * not change any other state properties, including enable, active, or
308 * Zero on success, error code on failure. Cannot return -EDEADLK.
310 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state
*state
,
311 struct drm_display_mode
*mode
)
313 struct drm_mode_modeinfo umode
;
315 /* Early return for no change. */
316 if (mode
&& memcmp(&state
->mode
, mode
, sizeof(*mode
)) == 0)
319 if (state
->mode_blob
)
320 drm_property_unreference_blob(state
->mode_blob
);
321 state
->mode_blob
= NULL
;
324 drm_mode_convert_to_umode(&umode
, mode
);
326 drm_property_create_blob(state
->crtc
->dev
,
329 if (IS_ERR(state
->mode_blob
))
330 return PTR_ERR(state
->mode_blob
);
332 drm_mode_copy(&state
->mode
, mode
);
333 state
->enable
= true;
334 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
337 memset(&state
->mode
, 0, sizeof(state
->mode
));
338 state
->enable
= false;
339 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
345 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc
);
348 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
349 * @state: the CRTC whose incoming state to update
350 * @blob: pointer to blob property to use for mode
352 * Set a mode (originating from a blob property) on the desired CRTC state.
353 * This function will take a reference on the blob property for the CRTC state,
354 * and release the reference held on the state's existing mode property, if any
358 * Zero on success, error code on failure. Cannot return -EDEADLK.
360 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state
*state
,
361 struct drm_property_blob
*blob
)
363 if (blob
== state
->mode_blob
)
366 if (state
->mode_blob
)
367 drm_property_unreference_blob(state
->mode_blob
);
368 state
->mode_blob
= NULL
;
371 if (blob
->length
!= sizeof(struct drm_mode_modeinfo
) ||
372 drm_mode_convert_umode(&state
->mode
,
373 (const struct drm_mode_modeinfo
*)
377 state
->mode_blob
= drm_property_reference_blob(blob
);
378 state
->enable
= true;
379 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
380 state
->mode
.name
, state
);
382 memset(&state
->mode
, 0, sizeof(state
->mode
));
383 state
->enable
= false;
384 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
390 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc
);
393 * drm_atomic_crtc_set_property - set property on CRTC
394 * @crtc: the drm CRTC to set a property on
395 * @state: the state object to update with the new property value
396 * @property: the property to set
397 * @val: the new property value
399 * Use this instead of calling crtc->atomic_set_property directly.
400 * This function handles generic/core properties and calls out to
401 * driver's ->atomic_set_property() for driver properties. To ensure
402 * consistent behavior you must call this function rather than the
403 * driver hook directly.
406 * Zero on success, error code on failure
408 int drm_atomic_crtc_set_property(struct drm_crtc
*crtc
,
409 struct drm_crtc_state
*state
, struct drm_property
*property
,
412 struct drm_device
*dev
= crtc
->dev
;
413 struct drm_mode_config
*config
= &dev
->mode_config
;
416 if (property
== config
->prop_active
)
418 else if (property
== config
->prop_mode_id
) {
419 struct drm_property_blob
*mode
=
420 drm_property_lookup_blob(dev
, val
);
421 ret
= drm_atomic_set_mode_prop_for_crtc(state
, mode
);
423 drm_property_unreference_blob(mode
);
426 else if (crtc
->funcs
->atomic_set_property
)
427 return crtc
->funcs
->atomic_set_property(crtc
, state
, property
, val
);
433 EXPORT_SYMBOL(drm_atomic_crtc_set_property
);
436 * This function handles generic/core properties and calls out to
437 * driver's ->atomic_get_property() for driver properties. To ensure
438 * consistent behavior you must call this function rather than the
439 * driver hook directly.
441 int drm_atomic_crtc_get_property(struct drm_crtc
*crtc
,
442 const struct drm_crtc_state
*state
,
443 struct drm_property
*property
, uint64_t *val
)
445 struct drm_device
*dev
= crtc
->dev
;
446 struct drm_mode_config
*config
= &dev
->mode_config
;
448 if (property
== config
->prop_active
)
449 *val
= state
->active
;
450 else if (property
== config
->prop_mode_id
)
451 *val
= (state
->mode_blob
) ? state
->mode_blob
->base
.id
: 0;
452 else if (crtc
->funcs
->atomic_get_property
)
453 return crtc
->funcs
->atomic_get_property(crtc
, state
, property
, val
);
461 * drm_atomic_crtc_check - check crtc state
462 * @crtc: crtc to check
463 * @state: crtc state to check
465 * Provides core sanity checks for crtc state.
468 * Zero on success, error code on failure
470 static int drm_atomic_crtc_check(struct drm_crtc
*crtc
,
471 struct drm_crtc_state
*state
)
473 /* NOTE: we explicitly don't enforce constraints such as primary
474 * layer covering entire screen, since that is something we want
475 * to allow (on hw that supports it). For hw that does not, it
476 * should be checked in driver's crtc->atomic_check() vfunc.
478 * TODO: Add generic modeset state checks once we support those.
481 if (state
->active
&& !state
->enable
) {
482 DRM_DEBUG_ATOMIC("[CRTC:%d] active without enabled\n",
487 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
488 * as this is a kernel-internal detail that userspace should never
489 * be able to trigger. */
490 if (drm_core_check_feature(crtc
->dev
, DRIVER_ATOMIC
) &&
491 WARN_ON(state
->enable
&& !state
->mode_blob
)) {
492 DRM_DEBUG_ATOMIC("[CRTC:%d] enabled without mode blob\n",
497 if (drm_core_check_feature(crtc
->dev
, DRIVER_ATOMIC
) &&
498 WARN_ON(!state
->enable
&& state
->mode_blob
)) {
499 DRM_DEBUG_ATOMIC("[CRTC:%d] disabled with mode blob\n",
508 * drm_atomic_get_plane_state - get plane state
509 * @state: global atomic state object
510 * @plane: plane to get state object for
512 * This function returns the plane state for the given plane, allocating it if
513 * needed. It will also grab the relevant plane lock to make sure that the state
518 * Either the allocated state or the error code encoded into the pointer. When
519 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
520 * entire atomic sequence must be restarted. All other errors are fatal.
522 struct drm_plane_state
*
523 drm_atomic_get_plane_state(struct drm_atomic_state
*state
,
524 struct drm_plane
*plane
)
526 int ret
, index
= drm_plane_index(plane
);
527 struct drm_plane_state
*plane_state
;
529 plane_state
= drm_atomic_get_existing_plane_state(state
, plane
);
533 ret
= drm_modeset_lock(&plane
->mutex
, state
->acquire_ctx
);
537 plane_state
= plane
->funcs
->atomic_duplicate_state(plane
);
539 return ERR_PTR(-ENOMEM
);
541 state
->plane_states
[index
] = plane_state
;
542 state
->planes
[index
] = plane
;
543 plane_state
->state
= state
;
545 DRM_DEBUG_ATOMIC("Added [PLANE:%d] %p state to %p\n",
546 plane
->base
.id
, plane_state
, state
);
548 if (plane_state
->crtc
) {
549 struct drm_crtc_state
*crtc_state
;
551 crtc_state
= drm_atomic_get_crtc_state(state
,
553 if (IS_ERR(crtc_state
))
554 return ERR_CAST(crtc_state
);
559 EXPORT_SYMBOL(drm_atomic_get_plane_state
);
562 * drm_atomic_plane_set_property - set property on plane
563 * @plane: the drm plane to set a property on
564 * @state: the state object to update with the new property value
565 * @property: the property to set
566 * @val: the new property value
568 * Use this instead of calling plane->atomic_set_property directly.
569 * This function handles generic/core properties and calls out to
570 * driver's ->atomic_set_property() for driver properties. To ensure
571 * consistent behavior you must call this function rather than the
572 * driver hook directly.
575 * Zero on success, error code on failure
577 int drm_atomic_plane_set_property(struct drm_plane
*plane
,
578 struct drm_plane_state
*state
, struct drm_property
*property
,
581 struct drm_device
*dev
= plane
->dev
;
582 struct drm_mode_config
*config
= &dev
->mode_config
;
584 if (property
== config
->prop_fb_id
) {
585 struct drm_framebuffer
*fb
= drm_framebuffer_lookup(dev
, val
);
586 drm_atomic_set_fb_for_plane(state
, fb
);
588 drm_framebuffer_unreference(fb
);
589 } else if (property
== config
->prop_crtc_id
) {
590 struct drm_crtc
*crtc
= drm_crtc_find(dev
, val
);
591 return drm_atomic_set_crtc_for_plane(state
, crtc
);
592 } else if (property
== config
->prop_crtc_x
) {
593 state
->crtc_x
= U642I64(val
);
594 } else if (property
== config
->prop_crtc_y
) {
595 state
->crtc_y
= U642I64(val
);
596 } else if (property
== config
->prop_crtc_w
) {
598 } else if (property
== config
->prop_crtc_h
) {
600 } else if (property
== config
->prop_src_x
) {
602 } else if (property
== config
->prop_src_y
) {
604 } else if (property
== config
->prop_src_w
) {
606 } else if (property
== config
->prop_src_h
) {
608 } else if (property
== config
->rotation_property
) {
609 state
->rotation
= val
;
610 } else if (plane
->funcs
->atomic_set_property
) {
611 return plane
->funcs
->atomic_set_property(plane
, state
,
619 EXPORT_SYMBOL(drm_atomic_plane_set_property
);
622 * This function handles generic/core properties and calls out to
623 * driver's ->atomic_get_property() for driver properties. To ensure
624 * consistent behavior you must call this function rather than the
625 * driver hook directly.
628 drm_atomic_plane_get_property(struct drm_plane
*plane
,
629 const struct drm_plane_state
*state
,
630 struct drm_property
*property
, uint64_t *val
)
632 struct drm_device
*dev
= plane
->dev
;
633 struct drm_mode_config
*config
= &dev
->mode_config
;
635 if (property
== config
->prop_fb_id
) {
636 *val
= (state
->fb
) ? state
->fb
->base
.id
: 0;
637 } else if (property
== config
->prop_crtc_id
) {
638 *val
= (state
->crtc
) ? state
->crtc
->base
.id
: 0;
639 } else if (property
== config
->prop_crtc_x
) {
640 *val
= I642U64(state
->crtc_x
);
641 } else if (property
== config
->prop_crtc_y
) {
642 *val
= I642U64(state
->crtc_y
);
643 } else if (property
== config
->prop_crtc_w
) {
644 *val
= state
->crtc_w
;
645 } else if (property
== config
->prop_crtc_h
) {
646 *val
= state
->crtc_h
;
647 } else if (property
== config
->prop_src_x
) {
649 } else if (property
== config
->prop_src_y
) {
651 } else if (property
== config
->prop_src_w
) {
653 } else if (property
== config
->prop_src_h
) {
655 } else if (property
== config
->rotation_property
) {
656 *val
= state
->rotation
;
657 } else if (plane
->funcs
->atomic_get_property
) {
658 return plane
->funcs
->atomic_get_property(plane
, state
, property
, val
);
667 * drm_atomic_plane_check - check plane state
668 * @plane: plane to check
669 * @state: plane state to check
671 * Provides core sanity checks for plane state.
674 * Zero on success, error code on failure
676 static int drm_atomic_plane_check(struct drm_plane
*plane
,
677 struct drm_plane_state
*state
)
679 unsigned int fb_width
, fb_height
;
682 /* either *both* CRTC and FB must be set, or neither */
683 if (WARN_ON(state
->crtc
&& !state
->fb
)) {
684 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
686 } else if (WARN_ON(state
->fb
&& !state
->crtc
)) {
687 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
691 /* if disabled, we don't care about the rest of the state: */
695 /* Check whether this plane is usable on this CRTC */
696 if (!(plane
->possible_crtcs
& drm_crtc_mask(state
->crtc
))) {
697 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
701 /* Check whether this plane supports the fb pixel format. */
702 ret
= drm_plane_check_pixel_format(plane
, state
->fb
->pixel_format
);
704 DRM_DEBUG_ATOMIC("Invalid pixel format %s\n",
705 drm_get_format_name(state
->fb
->pixel_format
));
709 /* Give drivers some help against integer overflows */
710 if (state
->crtc_w
> INT_MAX
||
711 state
->crtc_x
> INT_MAX
- (int32_t) state
->crtc_w
||
712 state
->crtc_h
> INT_MAX
||
713 state
->crtc_y
> INT_MAX
- (int32_t) state
->crtc_h
) {
714 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
715 state
->crtc_w
, state
->crtc_h
,
716 state
->crtc_x
, state
->crtc_y
);
720 fb_width
= state
->fb
->width
<< 16;
721 fb_height
= state
->fb
->height
<< 16;
723 /* Make sure source coordinates are inside the fb. */
724 if (state
->src_w
> fb_width
||
725 state
->src_x
> fb_width
- state
->src_w
||
726 state
->src_h
> fb_height
||
727 state
->src_y
> fb_height
- state
->src_h
) {
728 DRM_DEBUG_ATOMIC("Invalid source coordinates "
729 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
730 state
->src_w
>> 16, ((state
->src_w
& 0xffff) * 15625) >> 10,
731 state
->src_h
>> 16, ((state
->src_h
& 0xffff) * 15625) >> 10,
732 state
->src_x
>> 16, ((state
->src_x
& 0xffff) * 15625) >> 10,
733 state
->src_y
>> 16, ((state
->src_y
& 0xffff) * 15625) >> 10);
741 * drm_atomic_get_connector_state - get connector state
742 * @state: global atomic state object
743 * @connector: connector to get state object for
745 * This function returns the connector state for the given connector,
746 * allocating it if needed. It will also grab the relevant connector lock to
747 * make sure that the state is consistent.
751 * Either the allocated state or the error code encoded into the pointer. When
752 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
753 * entire atomic sequence must be restarted. All other errors are fatal.
755 struct drm_connector_state
*
756 drm_atomic_get_connector_state(struct drm_atomic_state
*state
,
757 struct drm_connector
*connector
)
760 struct drm_mode_config
*config
= &connector
->dev
->mode_config
;
761 struct drm_connector_state
*connector_state
;
763 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
767 index
= drm_connector_index(connector
);
770 * Construction of atomic state updates can race with a connector
771 * hot-add which might overflow. In this case flip the table and just
772 * restart the entire ioctl - no one is fast enough to livelock a cpu
773 * with physical hotplug events anyway.
775 * Note that we only grab the indexes once we have the right lock to
776 * prevent hotplug/unplugging of connectors. So removal is no problem,
777 * at most the array is a bit too large.
779 if (index
>= state
->num_connector
) {
780 DRM_DEBUG_ATOMIC("Hot-added connector would overflow state array, restarting\n");
781 return ERR_PTR(-EAGAIN
);
784 if (state
->connector_states
[index
])
785 return state
->connector_states
[index
];
787 connector_state
= connector
->funcs
->atomic_duplicate_state(connector
);
788 if (!connector_state
)
789 return ERR_PTR(-ENOMEM
);
791 state
->connector_states
[index
] = connector_state
;
792 state
->connectors
[index
] = connector
;
793 connector_state
->state
= state
;
795 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d] %p state to %p\n",
796 connector
->base
.id
, connector_state
, state
);
798 if (connector_state
->crtc
) {
799 struct drm_crtc_state
*crtc_state
;
801 crtc_state
= drm_atomic_get_crtc_state(state
,
802 connector_state
->crtc
);
803 if (IS_ERR(crtc_state
))
804 return ERR_CAST(crtc_state
);
807 return connector_state
;
809 EXPORT_SYMBOL(drm_atomic_get_connector_state
);
812 * drm_atomic_connector_set_property - set property on connector.
813 * @connector: the drm connector to set a property on
814 * @state: the state object to update with the new property value
815 * @property: the property to set
816 * @val: the new property value
818 * Use this instead of calling connector->atomic_set_property directly.
819 * This function handles generic/core properties and calls out to
820 * driver's ->atomic_set_property() for driver properties. To ensure
821 * consistent behavior you must call this function rather than the
822 * driver hook directly.
825 * Zero on success, error code on failure
827 int drm_atomic_connector_set_property(struct drm_connector
*connector
,
828 struct drm_connector_state
*state
, struct drm_property
*property
,
831 struct drm_device
*dev
= connector
->dev
;
832 struct drm_mode_config
*config
= &dev
->mode_config
;
834 if (property
== config
->prop_crtc_id
) {
835 struct drm_crtc
*crtc
= drm_crtc_find(dev
, val
);
836 return drm_atomic_set_crtc_for_connector(state
, crtc
);
837 } else if (property
== config
->dpms_property
) {
838 /* setting DPMS property requires special handling, which
839 * is done in legacy setprop path for us. Disallow (for
840 * now?) atomic writes to DPMS property:
843 } else if (connector
->funcs
->atomic_set_property
) {
844 return connector
->funcs
->atomic_set_property(connector
,
845 state
, property
, val
);
850 EXPORT_SYMBOL(drm_atomic_connector_set_property
);
853 * This function handles generic/core properties and calls out to
854 * driver's ->atomic_get_property() for driver properties. To ensure
855 * consistent behavior you must call this function rather than the
856 * driver hook directly.
859 drm_atomic_connector_get_property(struct drm_connector
*connector
,
860 const struct drm_connector_state
*state
,
861 struct drm_property
*property
, uint64_t *val
)
863 struct drm_device
*dev
= connector
->dev
;
864 struct drm_mode_config
*config
= &dev
->mode_config
;
866 if (property
== config
->prop_crtc_id
) {
867 *val
= (state
->crtc
) ? state
->crtc
->base
.id
: 0;
868 } else if (property
== config
->dpms_property
) {
869 *val
= connector
->dpms
;
870 } else if (connector
->funcs
->atomic_get_property
) {
871 return connector
->funcs
->atomic_get_property(connector
,
872 state
, property
, val
);
880 int drm_atomic_get_property(struct drm_mode_object
*obj
,
881 struct drm_property
*property
, uint64_t *val
)
883 struct drm_device
*dev
= property
->dev
;
887 case DRM_MODE_OBJECT_CONNECTOR
: {
888 struct drm_connector
*connector
= obj_to_connector(obj
);
889 WARN_ON(!drm_modeset_is_locked(&dev
->mode_config
.connection_mutex
));
890 ret
= drm_atomic_connector_get_property(connector
,
891 connector
->state
, property
, val
);
894 case DRM_MODE_OBJECT_CRTC
: {
895 struct drm_crtc
*crtc
= obj_to_crtc(obj
);
896 WARN_ON(!drm_modeset_is_locked(&crtc
->mutex
));
897 ret
= drm_atomic_crtc_get_property(crtc
,
898 crtc
->state
, property
, val
);
901 case DRM_MODE_OBJECT_PLANE
: {
902 struct drm_plane
*plane
= obj_to_plane(obj
);
903 WARN_ON(!drm_modeset_is_locked(&plane
->mutex
));
904 ret
= drm_atomic_plane_get_property(plane
,
905 plane
->state
, property
, val
);
917 * drm_atomic_set_crtc_for_plane - set crtc for plane
918 * @plane_state: the plane whose incoming state to update
919 * @crtc: crtc to use for the plane
921 * Changing the assigned crtc for a plane requires us to grab the lock and state
922 * for the new crtc, as needed. This function takes care of all these details
923 * besides updating the pointer in the state object itself.
926 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
927 * then the w/w mutex code has detected a deadlock and the entire atomic
928 * sequence must be restarted. All other errors are fatal.
931 drm_atomic_set_crtc_for_plane(struct drm_plane_state
*plane_state
,
932 struct drm_crtc
*crtc
)
934 struct drm_plane
*plane
= plane_state
->plane
;
935 struct drm_crtc_state
*crtc_state
;
937 if (plane_state
->crtc
) {
938 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
940 if (WARN_ON(IS_ERR(crtc_state
)))
941 return PTR_ERR(crtc_state
);
943 crtc_state
->plane_mask
&= ~(1 << drm_plane_index(plane
));
946 plane_state
->crtc
= crtc
;
949 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
951 if (IS_ERR(crtc_state
))
952 return PTR_ERR(crtc_state
);
953 crtc_state
->plane_mask
|= (1 << drm_plane_index(plane
));
957 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d]\n",
958 plane_state
, crtc
->base
.id
);
960 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
965 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane
);
968 * drm_atomic_set_fb_for_plane - set framebuffer for plane
969 * @plane_state: atomic state object for the plane
970 * @fb: fb to use for the plane
972 * Changing the assigned framebuffer for a plane requires us to grab a reference
973 * to the new fb and drop the reference to the old fb, if there is one. This
974 * function takes care of all these details besides updating the pointer in the
975 * state object itself.
978 drm_atomic_set_fb_for_plane(struct drm_plane_state
*plane_state
,
979 struct drm_framebuffer
*fb
)
982 drm_framebuffer_unreference(plane_state
->fb
);
984 drm_framebuffer_reference(fb
);
985 plane_state
->fb
= fb
;
988 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
989 fb
->base
.id
, plane_state
);
991 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
994 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane
);
997 * drm_atomic_set_crtc_for_connector - set crtc for connector
998 * @conn_state: atomic state object for the connector
999 * @crtc: crtc to use for the connector
1001 * Changing the assigned crtc for a connector requires us to grab the lock and
1002 * state for the new crtc, as needed. This function takes care of all these
1003 * details besides updating the pointer in the state object itself.
1006 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1007 * then the w/w mutex code has detected a deadlock and the entire atomic
1008 * sequence must be restarted. All other errors are fatal.
1011 drm_atomic_set_crtc_for_connector(struct drm_connector_state
*conn_state
,
1012 struct drm_crtc
*crtc
)
1014 struct drm_crtc_state
*crtc_state
;
1017 crtc_state
= drm_atomic_get_crtc_state(conn_state
->state
, crtc
);
1018 if (IS_ERR(crtc_state
))
1019 return PTR_ERR(crtc_state
);
1022 conn_state
->crtc
= crtc
;
1025 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d]\n",
1026 conn_state
, crtc
->base
.id
);
1028 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1033 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector
);
1036 * drm_atomic_add_affected_connectors - add connectors for crtc
1037 * @state: atomic state
1040 * This function walks the current configuration and adds all connectors
1041 * currently using @crtc to the atomic configuration @state. Note that this
1042 * function must acquire the connection mutex. This can potentially cause
1043 * unneeded seralization if the update is just for the planes on one crtc. Hence
1044 * drivers and helpers should only call this when really needed (e.g. when a
1045 * full modeset needs to happen due to some change).
1048 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1049 * then the w/w mutex code has detected a deadlock and the entire atomic
1050 * sequence must be restarted. All other errors are fatal.
1053 drm_atomic_add_affected_connectors(struct drm_atomic_state
*state
,
1054 struct drm_crtc
*crtc
)
1056 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1057 struct drm_connector
*connector
;
1058 struct drm_connector_state
*conn_state
;
1061 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
1065 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d] to %p\n",
1066 crtc
->base
.id
, state
);
1069 * Changed connectors are already in @state, so only need to look at the
1070 * current configuration.
1072 drm_for_each_connector(connector
, state
->dev
) {
1073 if (connector
->state
->crtc
!= crtc
)
1076 conn_state
= drm_atomic_get_connector_state(state
, connector
);
1077 if (IS_ERR(conn_state
))
1078 return PTR_ERR(conn_state
);
1083 EXPORT_SYMBOL(drm_atomic_add_affected_connectors
);
1086 * drm_atomic_add_affected_planes - add planes for crtc
1087 * @state: atomic state
1090 * This function walks the current configuration and adds all planes
1091 * currently used by @crtc to the atomic configuration @state. This is useful
1092 * when an atomic commit also needs to check all currently enabled plane on
1093 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1094 * to avoid special code to force-enable all planes.
1096 * Since acquiring a plane state will always also acquire the w/w mutex of the
1097 * current CRTC for that plane (if there is any) adding all the plane states for
1098 * a CRTC will not reduce parallism of atomic updates.
1101 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1102 * then the w/w mutex code has detected a deadlock and the entire atomic
1103 * sequence must be restarted. All other errors are fatal.
1106 drm_atomic_add_affected_planes(struct drm_atomic_state
*state
,
1107 struct drm_crtc
*crtc
)
1109 struct drm_plane
*plane
;
1111 WARN_ON(!drm_atomic_get_existing_crtc_state(state
, crtc
));
1113 drm_for_each_plane_mask(plane
, state
->dev
, crtc
->state
->plane_mask
) {
1114 struct drm_plane_state
*plane_state
=
1115 drm_atomic_get_plane_state(state
, plane
);
1117 if (IS_ERR(plane_state
))
1118 return PTR_ERR(plane_state
);
1122 EXPORT_SYMBOL(drm_atomic_add_affected_planes
);
1125 * drm_atomic_connectors_for_crtc - count number of connected outputs
1126 * @state: atomic state
1129 * This function counts all connectors which will be connected to @crtc
1130 * according to @state. Useful to recompute the enable state for @crtc.
1133 drm_atomic_connectors_for_crtc(struct drm_atomic_state
*state
,
1134 struct drm_crtc
*crtc
)
1136 struct drm_connector
*connector
;
1137 struct drm_connector_state
*conn_state
;
1139 int i
, num_connected_connectors
= 0;
1141 for_each_connector_in_state(state
, connector
, conn_state
, i
) {
1142 if (conn_state
->crtc
== crtc
)
1143 num_connected_connectors
++;
1146 DRM_DEBUG_ATOMIC("State %p has %i connectors for [CRTC:%d]\n",
1147 state
, num_connected_connectors
, crtc
->base
.id
);
1149 return num_connected_connectors
;
1151 EXPORT_SYMBOL(drm_atomic_connectors_for_crtc
);
1154 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls
1155 * @state: atomic state
1157 * This function should be used by legacy entry points which don't understand
1158 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after
1159 * the slowpath completed.
1161 void drm_atomic_legacy_backoff(struct drm_atomic_state
*state
)
1166 drm_modeset_backoff(state
->acquire_ctx
);
1168 ret
= drm_modeset_lock(&state
->dev
->mode_config
.connection_mutex
,
1169 state
->acquire_ctx
);
1172 ret
= drm_modeset_lock_all_crtcs(state
->dev
,
1173 state
->acquire_ctx
);
1177 EXPORT_SYMBOL(drm_atomic_legacy_backoff
);
1180 * drm_atomic_check_only - check whether a given config would work
1181 * @state: atomic configuration to check
1183 * Note that this function can return -EDEADLK if the driver needed to acquire
1184 * more locks but encountered a deadlock. The caller must then do the usual w/w
1185 * backoff dance and restart. All other errors are fatal.
1188 * 0 on success, negative error code on failure.
1190 int drm_atomic_check_only(struct drm_atomic_state
*state
)
1192 struct drm_device
*dev
= state
->dev
;
1193 struct drm_mode_config
*config
= &dev
->mode_config
;
1194 struct drm_plane
*plane
;
1195 struct drm_plane_state
*plane_state
;
1196 struct drm_crtc
*crtc
;
1197 struct drm_crtc_state
*crtc_state
;
1200 DRM_DEBUG_ATOMIC("checking %p\n", state
);
1202 for_each_plane_in_state(state
, plane
, plane_state
, i
) {
1203 ret
= drm_atomic_plane_check(plane
, plane_state
);
1205 DRM_DEBUG_ATOMIC("[PLANE:%d] atomic core check failed\n",
1211 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1212 ret
= drm_atomic_crtc_check(crtc
, crtc_state
);
1214 DRM_DEBUG_ATOMIC("[CRTC:%d] atomic core check failed\n",
1220 if (config
->funcs
->atomic_check
)
1221 ret
= config
->funcs
->atomic_check(state
->dev
, state
);
1223 if (!state
->allow_modeset
) {
1224 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1225 if (drm_atomic_crtc_needs_modeset(crtc_state
)) {
1226 DRM_DEBUG_ATOMIC("[CRTC:%d] requires full modeset\n",
1235 EXPORT_SYMBOL(drm_atomic_check_only
);
1238 * drm_atomic_commit - commit configuration atomically
1239 * @state: atomic configuration to check
1241 * Note that this function can return -EDEADLK if the driver needed to acquire
1242 * more locks but encountered a deadlock. The caller must then do the usual w/w
1243 * backoff dance and restart. All other errors are fatal.
1245 * Also note that on successful execution ownership of @state is transferred
1246 * from the caller of this function to the function itself. The caller must not
1247 * free or in any other way access @state. If the function fails then the caller
1248 * must clean up @state itself.
1251 * 0 on success, negative error code on failure.
1253 int drm_atomic_commit(struct drm_atomic_state
*state
)
1255 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1258 ret
= drm_atomic_check_only(state
);
1262 DRM_DEBUG_ATOMIC("commiting %p\n", state
);
1264 return config
->funcs
->atomic_commit(state
->dev
, state
, false);
1266 EXPORT_SYMBOL(drm_atomic_commit
);
1269 * drm_atomic_async_commit - atomic&async configuration commit
1270 * @state: atomic configuration to check
1272 * Note that this function can return -EDEADLK if the driver needed to acquire
1273 * more locks but encountered a deadlock. The caller must then do the usual w/w
1274 * backoff dance and restart. All other errors are fatal.
1276 * Also note that on successful execution ownership of @state is transferred
1277 * from the caller of this function to the function itself. The caller must not
1278 * free or in any other way access @state. If the function fails then the caller
1279 * must clean up @state itself.
1282 * 0 on success, negative error code on failure.
1284 int drm_atomic_async_commit(struct drm_atomic_state
*state
)
1286 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1289 ret
= drm_atomic_check_only(state
);
1293 DRM_DEBUG_ATOMIC("commiting %p asynchronously\n", state
);
1295 return config
->funcs
->atomic_commit(state
->dev
, state
, true);
1297 EXPORT_SYMBOL(drm_atomic_async_commit
);
1300 * The big monstor ioctl
1303 static struct drm_pending_vblank_event
*create_vblank_event(
1304 struct drm_device
*dev
, struct drm_file
*file_priv
, uint64_t user_data
)
1306 struct drm_pending_vblank_event
*e
= NULL
;
1307 unsigned long flags
;
1309 spin_lock_irqsave(&dev
->event_lock
, flags
);
1310 if (file_priv
->event_space
< sizeof e
->event
) {
1311 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
1314 file_priv
->event_space
-= sizeof e
->event
;
1315 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
1317 e
= kzalloc(sizeof *e
, GFP_KERNEL
);
1319 spin_lock_irqsave(&dev
->event_lock
, flags
);
1320 file_priv
->event_space
+= sizeof e
->event
;
1321 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
1325 e
->event
.base
.type
= DRM_EVENT_FLIP_COMPLETE
;
1326 e
->event
.base
.length
= sizeof e
->event
;
1327 e
->event
.user_data
= user_data
;
1328 e
->base
.event
= &e
->event
.base
;
1329 e
->base
.file_priv
= file_priv
;
1330 e
->base
.destroy
= (void (*) (struct drm_pending_event
*)) kfree
;
1336 static void destroy_vblank_event(struct drm_device
*dev
,
1337 struct drm_file
*file_priv
, struct drm_pending_vblank_event
*e
)
1339 unsigned long flags
;
1341 spin_lock_irqsave(&dev
->event_lock
, flags
);
1342 file_priv
->event_space
+= sizeof e
->event
;
1343 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
1347 static int atomic_set_prop(struct drm_atomic_state
*state
,
1348 struct drm_mode_object
*obj
, struct drm_property
*prop
,
1349 uint64_t prop_value
)
1351 struct drm_mode_object
*ref
;
1354 if (!drm_property_change_valid_get(prop
, prop_value
, &ref
))
1357 switch (obj
->type
) {
1358 case DRM_MODE_OBJECT_CONNECTOR
: {
1359 struct drm_connector
*connector
= obj_to_connector(obj
);
1360 struct drm_connector_state
*connector_state
;
1362 connector_state
= drm_atomic_get_connector_state(state
, connector
);
1363 if (IS_ERR(connector_state
)) {
1364 ret
= PTR_ERR(connector_state
);
1368 ret
= drm_atomic_connector_set_property(connector
,
1369 connector_state
, prop
, prop_value
);
1372 case DRM_MODE_OBJECT_CRTC
: {
1373 struct drm_crtc
*crtc
= obj_to_crtc(obj
);
1374 struct drm_crtc_state
*crtc_state
;
1376 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1377 if (IS_ERR(crtc_state
)) {
1378 ret
= PTR_ERR(crtc_state
);
1382 ret
= drm_atomic_crtc_set_property(crtc
,
1383 crtc_state
, prop
, prop_value
);
1386 case DRM_MODE_OBJECT_PLANE
: {
1387 struct drm_plane
*plane
= obj_to_plane(obj
);
1388 struct drm_plane_state
*plane_state
;
1390 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1391 if (IS_ERR(plane_state
)) {
1392 ret
= PTR_ERR(plane_state
);
1396 ret
= drm_atomic_plane_set_property(plane
,
1397 plane_state
, prop
, prop_value
);
1405 drm_property_change_valid_put(prop
, ref
);
1409 int drm_mode_atomic_ioctl(struct drm_device
*dev
,
1410 void *data
, struct drm_file
*file_priv
)
1412 struct drm_mode_atomic
*arg
= data
;
1413 uint32_t __user
*objs_ptr
= (uint32_t __user
*)(unsigned long)(arg
->objs_ptr
);
1414 uint32_t __user
*count_props_ptr
= (uint32_t __user
*)(unsigned long)(arg
->count_props_ptr
);
1415 uint32_t __user
*props_ptr
= (uint32_t __user
*)(unsigned long)(arg
->props_ptr
);
1416 uint64_t __user
*prop_values_ptr
= (uint64_t __user
*)(unsigned long)(arg
->prop_values_ptr
);
1417 unsigned int copied_objs
, copied_props
;
1418 struct drm_atomic_state
*state
;
1419 struct drm_modeset_acquire_ctx ctx
;
1420 struct drm_plane
*plane
;
1421 struct drm_crtc
*crtc
;
1422 struct drm_crtc_state
*crtc_state
;
1423 unsigned plane_mask
= 0;
1427 /* disallow for drivers not supporting atomic: */
1428 if (!drm_core_check_feature(dev
, DRIVER_ATOMIC
))
1431 /* disallow for userspace that has not enabled atomic cap (even
1432 * though this may be a bit overkill, since legacy userspace
1433 * wouldn't know how to call this ioctl)
1435 if (!file_priv
->atomic
)
1438 if (arg
->flags
& ~DRM_MODE_ATOMIC_FLAGS
)
1444 if ((arg
->flags
& DRM_MODE_PAGE_FLIP_ASYNC
) &&
1445 !dev
->mode_config
.async_page_flip
)
1448 /* can't test and expect an event at the same time. */
1449 if ((arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
) &&
1450 (arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
))
1453 drm_modeset_acquire_init(&ctx
, 0);
1455 state
= drm_atomic_state_alloc(dev
);
1459 state
->acquire_ctx
= &ctx
;
1460 state
->allow_modeset
= !!(arg
->flags
& DRM_MODE_ATOMIC_ALLOW_MODESET
);
1466 for (i
= 0; i
< arg
->count_objs
; i
++) {
1467 uint32_t obj_id
, count_props
;
1468 struct drm_mode_object
*obj
;
1470 if (get_user(obj_id
, objs_ptr
+ copied_objs
)) {
1475 obj
= drm_mode_object_find(dev
, obj_id
, DRM_MODE_OBJECT_ANY
);
1476 if (!obj
|| !obj
->properties
) {
1481 if (get_user(count_props
, count_props_ptr
+ copied_objs
)) {
1488 for (j
= 0; j
< count_props
; j
++) {
1490 uint64_t prop_value
;
1491 struct drm_property
*prop
;
1493 if (get_user(prop_id
, props_ptr
+ copied_props
)) {
1498 prop
= drm_property_find(dev
, prop_id
);
1504 if (copy_from_user(&prop_value
,
1505 prop_values_ptr
+ copied_props
,
1506 sizeof(prop_value
))) {
1511 ret
= atomic_set_prop(state
, obj
, prop
, prop_value
);
1518 if (obj
->type
== DRM_MODE_OBJECT_PLANE
&& count_props
&&
1519 !(arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
)) {
1520 plane
= obj_to_plane(obj
);
1521 plane_mask
|= (1 << drm_plane_index(plane
));
1522 plane
->old_fb
= plane
->fb
;
1526 if (arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
) {
1527 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1528 struct drm_pending_vblank_event
*e
;
1530 e
= create_vblank_event(dev
, file_priv
, arg
->user_data
);
1536 crtc_state
->event
= e
;
1540 if (arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
) {
1542 * Unlike commit, check_only does not clean up state.
1543 * Below we call drm_atomic_state_free for it.
1545 ret
= drm_atomic_check_only(state
);
1546 } else if (arg
->flags
& DRM_MODE_ATOMIC_NONBLOCK
) {
1547 ret
= drm_atomic_async_commit(state
);
1549 ret
= drm_atomic_commit(state
);
1553 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
1554 * locks (ie. while it is still safe to deref plane->state). We
1555 * need to do this here because the driver entry points cannot
1556 * distinguish between legacy and atomic ioctls.
1558 drm_for_each_plane_mask(plane
, dev
, plane_mask
) {
1560 struct drm_framebuffer
*new_fb
= plane
->state
->fb
;
1562 drm_framebuffer_reference(new_fb
);
1564 plane
->crtc
= plane
->state
->crtc
;
1567 drm_framebuffer_unreference(plane
->old_fb
);
1569 plane
->old_fb
= NULL
;
1572 if (ret
&& arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
) {
1574 * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive,
1575 * if they weren't, this code should be called on success
1576 * for TEST_ONLY too.
1579 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1580 if (!crtc_state
->event
)
1583 destroy_vblank_event(dev
, file_priv
,
1588 if (ret
== -EDEADLK
) {
1589 drm_atomic_state_clear(state
);
1590 drm_modeset_backoff(&ctx
);
1594 if (ret
|| arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
)
1595 drm_atomic_state_free(state
);
1597 drm_modeset_drop_locks(&ctx
);
1598 drm_modeset_acquire_fini(&ctx
);